HE-AAC (AAC, aacPlus) is an extension of AAC, designed to maintain good sound quality for low data rate streaming. MPEG-4 aacPlus, also known as High Efficiency-AAC, lossy compression is a standard audio materials a combination of three technologies coding: Advanced Audio Coding (AAC), Spectral Band Replication (SBR) and Parametric Stereo (PS). Both technology and AAC aacPlus has been developed by Swedish company Coding Technologies. SBR is a unique technique of widening the frequency band signal, which allows audio kodekom provide the sa